Jack



Patented Dec. 13,1921.

UNITED STATES PATENT ormca.

WILL! 3. HUMAN, OI DAYTON, OHIO, DON comm, OI DAYTON,

AssIGNon T0 was nax'ron' mun mo. A CORPORATION or onto.

Application filed larch 23, 1887. Serial R0. 178,879.

This invention relates to lifting jacks and more particularly to jacks adapted to be used in conjunction with automobiles and es cially those which employ balloon tires, whtre a comparatively large range of lift is re uired.

ne ob'ect of the invention is to provide a lifting Jack of the character mentioned in which a comparatively large range of lift 0 may be secu A further object of the invention is to provide a lifting jack of this character which is provided with a lifting screw having a supporting saddle at the top thereof and a supplementary saddle member adjustably su ported by and movable with the screw.

ther objects and advantages of the mvention will be apparent in the following description and in the accompanying drawings in which:

- Fig. 1 is a central vertical section through the llfting jack of the present invention;

Fig. 2 is a side elevation of the upper part of the jack showing the lifting member at an elevated position;

Fig. 3 is a transverse section through the jack on the line 33 of Fig. 1;

Fig. 4 is a section on the line H of Fig. 1 through the jack 0 rating socket; and

Fig. 5 is a view 0 the end of the operating handle.

Referring more particularly tothe drawings by reference numerals'in which corre sponding numerals designate like parts in the various views, the jack comprises a standard which extends vertically from the supporting base 11 to which the lower flange 12 of the standard is attached by A means of the rivets or other attaching mem- .bers 13. The standard 10 as shown is of hollow cylindrical form and in it is telescopically received the lifting member 15 of the jack. This lifting menber is guided at the upper end of the standard by the guide surface 16 and is prevented from rotating about its own axis by means of a laterally extending lug 17 provided at the lower portion of the lifting member, this lug being extended and positioned in the vertically extending slot 18 extending along one. side of the standard. This lug serves to restrain the lifting member 15 against rotation during operation of the jack. The lifting member 15 is provided with an internal bore 19, internal y threaded at its lower end, as designated by the numeral 21, and receives the vertical rotatable screw 20, provided with threads 22 which are engaged by the female threads 21 provided at the lower end of the lifting member.

The vertical screw is rigidly attached to a plate 25 as by means of the riveted or other fixed connection 26. The plate 25 is rotatab y mounted on a ball thrust bearing 27 whlch is received within the depression 28 at the lower end of the plate and in' the depression 29 provided in the base 11.. The

peripheral part of the plate 25 is p ovided tom of the jack as shown. Shaft 32 is attached as by means of a. connecting pin 34 to a drive collar 35 which forms a socket 36 within which the operating handle of the jack may be inserted, and the position of the operating shaft and socket adjacent the base of the jack in an easily accessible location permits the manipulation of the operating handle in a convenient manner. The socket 36 has an opening 37 of irregular shape as shown through which the correspondingly shaped end 38 of a handle may be inserted. fter the insertion of the handle end 38 a partial rotation of the handle within the socket causes the side projections of the bandle end to abut against the ridges 39 to efiect the rotation of the shaft 32 and operate the jack. As the end 38 of the handle fits neatly and is retained within the socket 36 the jack may be moved about and pulled toward the operator merely by his proper movements of the handle. The socket collar 35 being manually rotated by the operator by the rotational movements of the operating handle produce an elevation of the lifting member 15, which must move axially as it is prevented plate 25 against upward movefrom rotating by the engagement of the lug 17 in the slot on the side of the standard. The lifting member may thus be raised until the lug 17 comes in contact with the abutment surface 40 at the upper end of the slot 18. In thisposition as shown in Fig. 2, the object supported by the jack will be elevated the maximum amount permitted by the ack.

The upper end of the lifting member 15 has rigidly? attached thereto the top saddle 41 which, as shown, is provided with a slightly concave upper surface 42 on which the load is assumed. The saddle 41 is socketed so that the upper end of the lifting member may be seate'd'within the lower portion of the sad dle member and rigidly held in this position by the pin 43. A downwardly extending auxiliary saddle support 45 extends along the side of the jack standard adjacent the slot 18 in this member, and the upper part of the auxiliary saddle support 45 is integrally united or forms a part of the saddle member 41 from which it projects laterally above the upper end of the standard. The support 45 is formed of a central web portion 46 having rear flanges 47 and front flanges 48 extending laterally from the web which form opposed channels within which the two inwardly extending pins 49 and 50 of the auxiliary or supplementary saddle 51 are received. The forward flanged side 48 is rovided with a series of rests 52 spaced along the length of the support 45 so that they may be engaged by the abutment surface 53 of the auxiliary saddle. This saddle is provided with a slightly curved seat 54, and the two sides 55 and 56 which extend on opposite sides of the support 45 support the pins 49 and 50 so that the auxiliary saddle may be quickly manipulated by slightly raising the seat portion 54 to permit the elevation or depression of this saddle and to permit of bringing its abutment surface 53 I to engage with the proper rest 52 so that when the jack lifting member 15 is in its lowered position the saddle 51 is at the pro or height above the ground and only slig tly below the load which is to be elevated. It will be understood that the load may be applied to either of the saddles 42 or 51 whichever may be the most convenient. In the case where the jack is to be used for elevating wheels provided with balloon tires, where the lift of the jack is comparatively large in order to lift the wheel sufliciently far so that a large size tire completely clears the ound, the use of the auxiliary saddle 51 w1ll be quite convenient as it can readily be moved to a position along the support 45 where it is approximately ready to engage the load. ,The auxiliary saddle may be adjusted to such a position that it is'comparatively close to the ground and yet the jack construction is such that the total lift possible is quite large and not restricted to the neuauea minimum distance between the saddle and the ground. The total lift range of the jack is the total range of movement of the lift ing member 15 re ardless of the location of the auxiliary sad le on the saddle support 45. Since thetotal lift range of the threaded lifting member 15, is a distance almost equal to the overall height of the jack, the load may be raised a distance almost equal to the jack height even though the initial distance from the ground to the load supporting saddle is only a fractional part of the lift range or jack height. The auxiliary saddle will be supported firmly and in a solid manner on the support'45 and this support is solidly connected in a strong and rigid manner'to the lower end of the lifting member 15 of the jack. This connection is effectcd by means of the bolt or screw 60 which engages the bottom part 61 of the saddle support 45 and'is threaded into the projection 17 as indicated at 62. When the bolt 60 is in place the pins 49 and 50 provided on the sides of the auxiliary saddle 51 will be prevented from clearing the lower end of the forward flanged side 48 of the saddle support and the loss of the auxiliary saddle is thus entirely prevented. If, however, the bolt 60 is removed or during the assemb'l of the parts before the insertion of the olt 60, the pins 49 and 50 of the auxiliary saddle are permitted to freely move'along the lower end of the auxiliary saddle support. While the form of apparatus herein described constitutes a pre erred embodiment of the invention, it is to be understood that the invention is not limited to this precise form of apparatus, and that chan es may be made therein without departin om the scope of the invention which is de ed in the appended claims.

What is claimed is: 1. A lifting jack comprising a standard, a screw rotatable within said standard, means for rotating said screw, a lifting member axially movable within said standard b said screw, a saddle carrier carried by sai lifting member at a' point above said standard and extendin down alongl the side of said standard, an means at t e lower end of said saddle carrier connected to a bottom portion of said lifting member, said standard having a slot extending lengthwise therein in which said last-named means operates. 2. A lifting jack comprising'a standard, a screw rotatable therein and provided with external threads along its length, a lifting member having internal threads engaging the threads on said screw and adapted to be elevated or depressed when said screw is rotated,said lifting member being guided at its upper end 'by said standard, rotatable means at the lower end of said jack for rotating said screw, a saddle carrier extending from the upper end of said lifting memthe side of said'standard and abutting at its lower end firmly against the lower end of said lifting member, and a saddle mounted on said saddle carrier.

3. A lifting jack comprising a standard, a vertical screw mounted in said standard for rotational movements, ard, a bearing between said base and the lower end of said screw, means for rotating said screw, a lifting member in which said screw telescopes, said lifting member being her down along provided with internal threads engaging the threads on said screw and being guided at its upper end by the upper end of said standard, a supporting saddle at the u per end of said lifting member, an auxiiary saddle support extendin along the side of said standard and rigid y connected at its upper end to the upper end of said. lifting member, an adjustable saddle mounted on said saddle carrier, said saddle carrier having means for adjustably supporting said auxiliarysaddle in a plurality of different positions, and a lu extending from the lower end of said lifting member and connected to the lower end of said auxiliary saddle carrier, said standard having a slot therein in which said lug is guided.

said standard, a a base for said stand- 4. A lifting jack comprising a vertical standard, a base attached at the bottom of said standard, a bearing supported by said base, a gear rotatably supported and centered by said bearing at the lower end of second gear engageable therewith and maintaining said first gear in position on said bearing, means for rotating said second gear, a vertical screw fixed to said first gear and extending upwardly within said housing, a lifting member having an internally threaded portion engageable with said screw for causing vertical movements of said lifting member when said screw is rotated, said lifting member being guided within said housing for axial movement, a lug projecting from a bottom portion of said lifting member, said standard having a vertically extendin groove therein for guiding said lug, a sad 1e support extending along the side of said housing and attached at its lower end to said In and at its u er end to said lifting mem er, and'a sad le supported on said saddle carrier.

In testimony whereof I hereto aflix my signature.

WILLIAM B. RUNYAN. 

